import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
Vue.use(VueRouter)

const router = new VueRouter({
  routes: [
    {path:'/',redirect:'/login'},
    {path:'/login',component:Login},
    {
      path:'/home',
      component:Home,
      redirect:'/welcome',
      children:[
        {path:'/welcome',component:Welcome},
        {path:'/users',component:Users},
        {path:'/rights',component:Rights},
        {path:'/roles',component:Roles}
      ]
    }
  ]
})

// 挂载路由导航守卫
router.beforeEach((to, from, next)=>{
  //to将要访问的路径
  //from代表从哪个路径跳转而来
  //next是一个函数，表示放行
  // next()放行  next('/login') 强制跳转
  if(to.path==='/login') return next();
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token');
  if(!tokenStr) return next('/login')
  next()
})
export default router
